diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index a2cc3dad7b1..44f7eb2289b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,6 +10,7 @@ env:
     # These must be set for fetchdep.sh to get the right branch
     REPOSITORY: ${{ github.repository }}
     PR_NUMBER: ${{ github.event.pull_request.number }}
+    COMMIT_SHA: ${{ github.event.pull_request.head.sha }}
 permissions: {} # No permissions required
 jobs:
     build:
diff --git a/scripts/get-version-from-git.sh b/scripts/get-version-from-git.sh
index ef6be6294ca..8641ab0ca51 100755
--- a/scripts/get-version-from-git.sh
+++ b/scripts/get-version-from-git.sh
@@ -7,5 +7,6 @@ set -e
 
 # Since the deps are fetched from git, we can rev-parse
 JSSDK_SHA=$(git -C node_modules/matrix-js-sdk rev-parse --short=7 HEAD)
-VECTOR_SHA=$(git rev-parse --short=7 HEAD) # use the ACTUAL SHA rather than assume develop
-echo $VECTOR_SHA-js-$JSSDK_SHA
+#VECTOR_SHA=$(git rev-parse --short=7 HEAD) # use the ACTUAL SHA rather than assume develop
+#echo $VECTOR_SHA-js-$JSSDK_SHA
+echo "${COMMIT_SHA:0:7}-js-$JSSDK_SHA"